Personality tests are fun and thus likely to be shared on Facebook. Qualifio provides you with two sharing options: participants are either able to share your personality test or their test results. Both direct users back to your campaign.
To hide the 'Share on my wall' button, please access your campaign's Look & Feel step and click on 'Change look and feel', then select 'Advanced Settings' from the list of menus that appears on the left. From there, you can edit the CSS code according to your preferences.
If you don't want users to share your campaign, but still want to enable them to share their test results, you can add to the CSS tab: